CN101247978A - Power output device and its control method and vehicle - Google Patents

Power output device and its control method and vehicle Download PDF

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Publication number
CN101247978A
CN101247978A CNA2006800310764A CN200680031076A CN101247978A CN 101247978 A CN101247978 A CN 101247978A CN A2006800310764 A CNA2006800310764 A CN A2006800310764A CN 200680031076 A CN200680031076 A CN 200680031076A CN 101247978 A CN101247978 A CN 101247978A
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China
Prior art keywords
combustion engine
power
drive shaft
condition
operative condition
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CNA2006800310764A
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Chinese (zh)
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CN101247978B (en
Inventor
上地健介
木村秋广
安藤大吾
牟田浩一郎
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Toyota Motor Corp
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Toyota Motor Corp
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    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
    • B60W20/15—Control strategies specially adapted for achieving a particular effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
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    • B60K6/365—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings with the gears having orbital motion
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    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/44—Series-parallel type
    • B60K6/445—Differential gearing distribution type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
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    • B60K6/448—Electrical distribution type
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
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    • B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
    • B60K6/52—Driving a plurality of drive axles, e.g. four-wheel drive
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    • F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
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    • F16H37/084—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths at least one power path being a continuously variable transmission, i.e. CVT
    • F16H2037/0866—Power split variators with distributing differentials, with the output of the CVT connected or connectable to the output shaft
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Control Of Transmission Device (AREA)

Abstract

The invention provides a power output unit, control method therefor, and vehicle. When a brake pedal is pressed, when a value 1 is set on a catalyst degradation suppression flag Fc and a catalyst degradation suppression control is required, a motor adjustable for the number of rotation of an engine is controlled so as to approximate the number of its rotation Ne to the number of target rotation Ne*, while continuing explosive combustion of the engine (S180 and S190). Thus, the number of rotation Ne of the engine can be set at the target number of rotation Ne*, and wasteful fuel consumption caused by operations of the engine at high speed rotation can be suppressed. Consequently, the energy efficiency of the vehicle can be improved.

Description

Power take-off implement and control method thereof and vehicle
Technical field
The present invention relates to power take-off implement and control method thereof and vehicle.
Background technology
In the past, as this power take-off implement, the someone had proposed a kind of car-mounted device, comprising: combustion engine; On the output shaft of combustion engine and axletree, link the planetary wheel that planetary gear carrier and internal gear are arranged; First electrical motor to planetary sun gear outputting power; Second electrical motor (for example, with reference to patent documentation 1) to the internal gear outputting power.In this device, when the catalytic system of purifying exhaust gas of internal combustion engine is design temperature when above, in order to suppress the aging of catalyst, and forbid the oil-break of combustion engine.When this forbidden oil-break during when needing braking force, carry out throttling control so that be 0, and keep the rotating speed of combustion engine, to second electrical motor regenerate control and output braking force by first electrical motor from the output torque value of combustion engine.
Patent documentation 1: the Japanese documentation spy opens the 2004-340102 communique.
Summary of the invention
In above-mentioned power take-off implement, when forbidding oil-break during when needing braking force owing to keep the rotating speed of combustion engine, therefore change when being rotated with height when combustion engine by first electrical motor, can consume a lot of energy, thereby the deterioration gas consumption rate.In addition, when after during the chaufeur bend the throttle since with height change, low torque running combustion engine, therefore can reduce efficiency.And if the rotating speed of combustion engine is remained on the high speed of a motor vehicle of changeing and reduce, then first electrical motor is rotated with the height commentaries on classics, produces hypervelocity sometimes.
The purpose of power take-off implement of the present invention and control method thereof and vehicle is, when forbidding cutting off when needing braking force during the combustion engine fuel supplying, when keeping internal combustion engine operation, can promptly reduce the rotating speed of combustion engine.In addition, the purpose of power take-off implement of the present invention and control method thereof and vehicle also is, when forbidding cutting off to the combustion engine fuel supplying, can improve efficiency.
At least a portion in order to achieve the above object, power take-off implement of the present invention and control method thereof and vehicle adopt following method.
The invention provides following power take-off implement,
A kind of power take-off implement, to the axle drive shaft outputting power, described power take-off implement is characterised in that, comprising:
Combustion engine;
The electric power input-output unit is connected on the output shaft and described axle drive shaft of this combustion engine, is accompanied by the input and output of electric power and power, will export to described axle drive shaft from least a portion of the power of described combustion engine;
Electrical motor can be to described axle drive shaft input and output power;
Electricity accumulating unit can carry out exchange of electric power with described electric power input-output unit and described electrical motor;
Require the propulsive effort setup unit, setting should be exported to the propulsive effort that requires of described axle drive shaft;
Target operative condition setup unit, when the explosive combustion continuation condition of the explosive combustion that continues described combustion engine is false, the propulsive effort that requires according to described setting, under the situation of the discontinuous running that comprises described combustion engine, set the target operative condition of this combustion engine, when described explosive combustion continuation condition is set up, according to the propulsive effort that requires of described setting, under the situation that keeps described combustion engine to remain in operation, set the target operative condition of this combustion engine;
Control unit, during described explosive combustion continuation condition establishment, when the driving condition that is not in to the regulation of described axle drive shaft output braking force or light load, the high load capacity burning continues control in the execution, to described combustion engine, described electric power input-output unit and described electrical motor are controlled, make described combustion engine turn round with the target operative condition of described setting, and the feasible propulsive effort that requires propulsive effort based on described setting is exported to described axle drive shaft, when being in the driving condition of described regulation, carry out low load combustion and continue control, to described combustion engine, described electric power input-output unit and described electrical motor are controlled, the feasible continuation that is accompanied by the explosive combustion of described combustion engine, this combustion engine turns round with the target operative condition of described setting, and makes the propulsive effort that requires propulsive effort based on described setting be exported to described axle drive shaft.
In power take-off implement of the present invention, when the explosive combustion continuation condition of the explosive combustion that continues combustion engine is false, according to the propulsive effort that requires that should export to axle drive shaft, under the situation of the discontinuous running that comprises combustion engine, set the target operative condition of combustion engine, when explosive combustion continuation condition is set up, propulsive effort is as requested set the target operative condition of combustion engine under the situation that keeps combustion engine to remain in operation.And, during the establishment of explosive combustion continuation condition, when the driving condition that is not in to the regulation of axle drive shaft output braking force or light load, the high load capacity burning continues control in the execution, described combustion engine, described electric power input-output unit and described electrical motor are controlled, make combustion engine turn round, and make and be exported to axle drive shaft based on the propulsive effort that requires propulsive effort with the target operative condition of setting.Thus, can when the discontinuous running that keeps combustion engine is with the target operative condition running combustion engine that sets, will export to axle drive shaft based on the propulsive effort that requires propulsive effort.On the other hand, when being in the driving condition of regulation, carry out low load combustion and continue control, described combustion engine, described electric power input-output unit and described electrical motor are controlled, the feasible continuation that is accompanied by the explosive combustion of combustion engine, this combustion engine turns round with the target operative condition that sets, and makes and to be exported to axle drive shaft based on the propulsive effort that requires propulsive effort.Thus, can be with target operative condition running combustion engine when keeping the discontinuous running of combustion engine, and will export to axle drive shaft based on the propulsive effort that requires propulsive effort.Here, when the target operative condition of the combustion engine when explosive combustion continuation condition is set up becomes the less relatively operative condition of rotating speed, can in the explosive combustion that continues combustion engine, reduce the rotating speed of combustion engine, with target operative condition running combustion engine, thereby suppress useless consumption of fuel.As a result, can improve the efficiency of device.
In the power take-off implement of the invention described above, described target operative condition setup unit also can be the unit that the operative condition that when being in the driving condition of described regulation described combustion engine carried out independent operation with the rotating speed of regulation is set at described target operative condition.So, when with target operative condition running combustion engine, can not output power to axle drive shaft by the electric power output unit.As a result, need not from the unnecessary braking force of electrical motor output.
In power take-off implement of the present invention, described control unit also can be to control to make the operative condition that changes this combustion engine in the scope that the explosive combustion of described combustion engine continues so that the operative condition of described combustion engine reaches the unit of the target operative condition of described setting when being in the driving condition of described regulation.So, can be when continuing the explosive combustion of combustion engine the operative condition of combustion engine be reached the target operative condition.At this moment, described control unit also can be to control when being in the driving condition of described regulation so that the operative condition time per unit of described combustion engine changes the regulation rotating speed and reaches the unit of the target operative condition of described setting.
And, in power take-off implement of the present invention, also can comprise: the import limit setup unit, set the import limit that allows electrically-charged maximum power as this electricity accumulating unit according to the state of described electricity accumulating unit, described control unit is the unit of in the scope of the import limit of described setting described combustion engine, described electric power input-output unit and described electrical motor being controlled.So, can avoid electricity accumulating unit being charged with excessive electric power.At this moment, also can comprise: the charge-discharge electric power detecting unit, the electric power that detection discharges and recharges described electricity accumulating unit, described control unit is to be described detected charge-discharge electric power to be in carry out described low load combustion in the scope of import limit of described setting when continuing control when being in the driving condition of described regulation, in the described combustion engine that can not turn round with the target operative condition of described setting, control the unit that sprays and this combustion engine is turned round with described target operative condition with the fuel that stops described combustion engine.So, can be with target operative condition running combustion engine.And, at this moment, described control unit also can be when for the fuel injection that stops described combustion engine this combustion engine being controlled with described target operative condition running, to control so that the rotating speed time per unit of this combustion engine changes the unit of regulation rotating speed.So, can avoid the rotating speed cataclysm of combustion engine, suppress the unfavorable condition that the rotating speed cataclysm because of combustion engine causes, for example torque shock ends etc.
And, in power take-off implement of the present invention, described combustion engine is equipped with the waste gas purification apparatus that uses the catalyst purifying exhaust air, and described explosive combustion continuation condition is to carry out the aging condition that suppresses control of aged catalyst of the catalyst that suppresses described waste gas purification apparatus.Catalyst aging that so, can suppress waste gas purification apparatus.
Perhaps, in power take-off implement of the present invention, described electric power input-output unit also can be the unit that comprises triple axle power input-output unit and electrical generator, the input and output of described triple axle power input-output unit are connected on these three axles of the output shaft of described combustion engine, described axle drive shaft and S. A., give wantonly two power in these three and to remaining axle input and output power, described electrical generator can be to described S. A. input and output power according to input and output.
The invention provides a kind of vehicle, described vehicle loading has the power take-off implement of the present invention of above-mentioned arbitrary mode, and axletree is attached on the described axle drive shaft.Roughlly speaking, described power take-off implement is a following apparatus, that is, a kind of power take-off implement to the axle drive shaft outputting power, comprising: combustion engine; The electric power input-output unit is connected on the output shaft and described axle drive shaft of this combustion engine, is accompanied by the input and output of electric power and power, will export to described axle drive shaft from least a portion of the power of described combustion engine; Electrical motor can be to described axle drive shaft input and output power; Electricity accumulating unit can carry out exchange of electric power with described electric power input-output unit and described electrical motor; Require the propulsive effort setup unit, setting should be exported to the propulsive effort that requires of described axle drive shaft; Target operative condition setup unit, when the explosive combustion continuation condition of the explosive combustion that continues described combustion engine is false, the propulsive effort that requires according to described setting, under the situation of the discontinuous running that comprises described combustion engine, set the target operative condition of this combustion engine, when described explosive combustion continuation condition is set up, according to the propulsive effort that requires of described setting, under the situation that keeps described combustion engine to remain in operation, set the target operative condition of this combustion engine; Control unit, during described explosive combustion continuation condition establishment, when the driving condition that is not in to the regulation of described axle drive shaft output braking force or light load, the high load capacity burning continues control in the execution, to described combustion engine, described electric power input-output unit and described electrical motor are controlled, make described combustion engine turn round with the target operative condition of described setting, and the feasible propulsive effort that requires propulsive effort based on described setting is exported to described axle drive shaft, when being in the driving condition of described regulation, carry out low load combustion and continue control, to described combustion engine, described electric power input-output unit and described electrical motor are controlled, the feasible continuation that is accompanied by the explosive combustion of described combustion engine, this combustion engine turns round with the target operative condition of described setting, and makes the propulsive effort that requires propulsive effort based on described setting be exported to described axle drive shaft.
In vehicle of the present invention, owing to be mounted with the power take-off implement of the present invention of above-mentioned arbitrary mode, therefore power take-off implement of the present invention plays following effect: for example, can when the discontinuous running that keeps combustion engine is with the target operative condition running combustion engine that sets, will export to axle drive shaft based on the propulsive effort that requires propulsive effort; Can in the explosive combustion that continues combustion engine,, and will export to axle drive shaft based on the propulsive effort that requires propulsive effort with target operative condition running combustion engine; Can in the explosive combustion that continues combustion engine, reduce the rotating speed of combustion engine, with target operative condition running combustion engine; Can suppress the consumption of useless fuel, improve the efficiency of device etc.
The present invention also provides the control method of following power take-off implement:
Described power take-off implement comprises: combustion engine; The electric power input-output unit is connected on the output shaft and described axle drive shaft of this combustion engine, is accompanied by the input and output of electric power and power, will export to described axle drive shaft from least a portion of the power of described combustion engine; Electrical motor can be to described axle drive shaft input and output power; Electricity accumulating unit can carry out exchange of electric power with described electric power input-output unit and described electrical motor, and the control method of described power take-off implement comprises the steps:
(a) when the explosive combustion continuation condition of the explosive combustion that continues described combustion engine is false, according to the propulsive effort that requires that should export to described axle drive shaft, under the situation of the discontinuous running that comprises described combustion engine, set the target operative condition of this combustion engine, when described explosive combustion continuation condition is set up, according to the described propulsive effort that requires, under the situation that keeps described combustion engine to remain in operation, set the target operative condition of this combustion engine;
(b) during described explosive combustion continuation condition establishment, when the driving condition that is not in to the regulation of described axle drive shaft output braking force or light load, the high load capacity burning continues control in the execution, to described combustion engine, described electric power input-output unit and described electrical motor are controlled, make described combustion engine turn round with the target operative condition of described setting, and the feasible propulsive effort that requires propulsive effort based on described setting is exported to described axle drive shaft, when being in the driving condition of described regulation, carry out low load combustion and continue control, to described combustion engine, described electric power input-output unit and described electrical motor are controlled, the feasible continuation that is accompanied by the explosive combustion of described combustion engine, this combustion engine turns round with the target operative condition of described setting, and makes the propulsive effort that requires propulsive effort based on described setting be exported to described axle drive shaft.
In the control method of power take-off implement of the present invention, when the explosive combustion continuation condition of the explosive combustion that continues described combustion engine is false, according to the propulsive effort that requires that should export to described axle drive shaft, under the situation of the discontinuous running that comprises described combustion engine, set the target operative condition of this combustion engine, when described explosive combustion continuation condition is set up, according to the described propulsive effort that requires, under the situation that keeps described combustion engine to remain in operation, set the target operative condition of this combustion engine.And during described explosive combustion continuation condition establishment, when the driving condition that is not in to the regulation of described axle drive shaft output braking force or light load, the high load capacity burning continues control in the execution, described combustion engine, described electric power input-output unit and described electrical motor are controlled, make described combustion engine turn round, and make the propulsive effort that requires propulsive effort based on described setting be exported to described axle drive shaft with the target operative condition of described setting.Thus, can when the discontinuous running that keeps combustion engine is with the target operative condition running combustion engine that sets, will export to axle drive shaft based on the propulsive effort that requires propulsive effort.On the other hand, when being in the driving condition of described regulation, carry out low load combustion and continue control, described combustion engine, described electric power input-output unit and described electrical motor are controlled, the feasible continuation that is accompanied by the explosive combustion of described combustion engine, this combustion engine turns round with the target operative condition of described setting, and makes the propulsive effort that requires propulsive effort based on described setting be exported to described axle drive shaft.Thus, can be with target operative condition running combustion engine when keeping the discontinuous running of combustion engine, and will export to axle drive shaft based on the propulsive effort that requires propulsive effort.Here, when the target operative condition of the combustion engine when explosive combustion continuation condition is set up becomes the less relatively operative condition of rotating speed, can in the explosive combustion that continues combustion engine, reduce the rotating speed of combustion engine, with target operative condition running combustion engine, thereby suppress useless consumption of fuel.As a result, can improve the efficiency of device.
Control method at the power take-off implement of the invention described above, described step (b) also can be when being to make the charge-discharge electric power that described electricity accumulating unit is discharged and recharged be positioned at the scope of the import limit of described electricity accumulating unit when being in the driving condition of described regulation, and when carrying out described low load combustion and continuing control, in the described combustion engine that can not turn round with the target operative condition of described setting, control the step of spraying and this combustion engine is turned round with described target operative condition with the fuel that stops described combustion engine.So, can with excessive electric power electricity accumulating unit be turned round combustion engine under the electrically-charged state as the target operative condition having avoided.
Description of drawings
Fig. 1 is that schematic representation is mounted with the pie graph as the structure of the hybrid vehicle 20 of the power take-off implement of one embodiment of the present of invention;
Fig. 2 is the pie graph of the structure of schematic representation driving engine 22;
The diagram of circuit of an example of Fig. 3 glancing impact control program that to be expression carry out with electronic control unit 70 by hybrid power;
Fig. 4 represents to require braking torque to set the instruction diagram of an example using mapping graph;
Fig. 5 is that expression representative is accompanied by the oil-break of driving engine 22 and the instruction diagram of an example of the alignment chart of the mechanical relationship of the rotating speed of the turning unit of the power distribution integration mechanism 30 of glancing impact and torque;
Fig. 6 is that expression representative is accompanied by the oil-break of driving engine 22 and the instruction diagram of an example of the alignment chart of the mechanical relationship of the rotating speed of the turning unit of the power distribution integration mechanism 30 of glancing impact and torque;
Fig. 7 chaufeur that is expression when catalyst deterioration being suppressed flag F c value of being changed to 1 is stepped on the instruction diagram of an example of the time variation of the driving engine 22 of glancing impact of brake pedal 85 and the state of motor MG1, MG2 etc.;
Fig. 8 is the pie graph of schematic representation loading as the hybrid vehicle 20B of the power take-off implement of second embodiment;
The diagram of circuit of an example of Fig. 9 glancing impact control program that to be the hybrid power of expression by second embodiment carry out with electronic control unit 70;
Figure 10 is the pie graph of structure of the driving engine 120 of schematic representation variation;
Figure 11 is the pie graph of structure of the driving engine 220 of schematic representation variation.
The specific embodiment
Below, use embodiment that the specific embodiment of the present invention is described.Fig. 1 is that schematic representation is mounted with the pie graph as the structure of the hybrid vehicle 20 of the power take-off implement of one embodiment of the present of invention.As shown in the figure, the hybrid vehicle 20 of embodiment comprises: driving engine 22; Power distribution integration mechanism 30 is connected the planetary gear carrier 34 that makes miniature gears 33 rotation on the bent axle 26 as the output shaft of driving engine 22 via bumper 28; Motor MG1 is connected on the sun gear 31 of planetary wheel 30, can generate electricity; Motor MG2 is connected on the internal gear axle 32a via reducing gear 35, and this internal gear axle 32a is connected on the internal gear 32 of planetary wheel 30 as axle drive shaft; Hybrid power is controlled hybrid vehicle 20 integral body with electronic control unit 70.Wherein, be connected on drive wheel 63a, the 63b by gear mechanism 60 and differential gear 62 as the internal gear axle 32a of axle drive shaft, its power of exporting to internal gear axle 32a is used as the power of the usefulness of travelling.
Driving engine 22 for example can be the combustion engine by the fuel outputting power of hydrocarbons such as gasoline or light oil, as shown in Figure 2, air by airfilter 122 cleanings enters via flow regulating valve 124, simultaneously from fuel injection valve 126 injected petrol, inlet air and gasoline mix, this miscellaneous gas enters in the fuel chambers via air inlet valve 128, electro spark by light-up plug 130 makes its explosive combustion, and the crank motion of the piston 132 that will push by this energy is converted to rotatablely moving of bent axle 26.From the exhaust of driving engine 22 via purifying carbonic oxide (CO) and hydro-carbon (HC), oxides of nitrogen (NO X) the clean-up device (three-way catalyst) 134 of objectionable constituent be expelled in the extraneous air.
Driving engine 22 is controlled with electronic control unit (below, be called Engine ECU) 24 by driving engine.Engine ECU 24 is to be the microprocessor at center with CPU 24a, except CPU24a, also comprises: the ROM 24b of storage processing program; The RAM24c of temporary transient storage data; And not shown input/output port and communication port.The signal of the various sensors that detect from state to Engine ECU 24 input via input port to driving engine 22, for example: from the crank position of the crank-position sensor 140 of the position of rotation that detects bent axle 26, coolant water temperature from the cooling-water temperature sensor 142 of the temperature of the cooling water expansion tank of detection of engine 22, temperature from the catalyst layer that is installed in the temperature sensor 135 on the clean-up device 134, from the cylinder pressure that is installed in the pressure sensor 143 in the combustion chamber, open from detection and to close the cam position of cam-position sensor 144 of position of rotation that carries out the camshaft of the air inlet valve 128 of intake and exhaust and blow off valve to combustion chamber, throttle valve position from the throttle valve position sensor 146 of the position of detecting flow regulating valve 124, from the airmoter signal that is installed in the airmoter 148 on the air inlet pipe, from intake temperature that is installed in the temperature sensor 149 on the air inlet pipe equally etc.In addition, be used to drive the various control signals of driving engine 22 via output port from Engine ECU 24 output, for example: the drive signal of fuel injection valve 126, regulate flow regulating valve 124 the position throttle valve motor 136 drive signal, with the control signal of the incorporate high-tension coil 138 of firing unit, can change the control signal etc. of vario valve timing mechanism 150 of the opening and close timing of air inlet valve 128.Wherein, Engine ECU 24 communicates with electronic control unit 70 with hybrid power, by from hybrid power with the control signal of electronic control unit 70 to driving engine 22 control of turning round, output data relevant as required simultaneously with the operative condition of driving engine 22.
Power distribution integration mechanism 30 comprises: the sun gear 31 of external tooth gear; Be configured in the internal gear 32 of the internal-gear on the concentric circles with sun gear 31; With sun gear 31 engagement, and with a plurality of miniature gearss 33 of internal gear 32 ingears; Keep the planetary gear carrier 34 of a plurality of miniature gearss 33 in the mode of free rotation and revolution, this power distribution integration mechanism 30 is constituted as the sun and planet gear that sun gear 31, internal gear 32 and planetary gear carrier 34 is carried out differential action as turning unit.For power distribution integration mechanism 30, on planetary gear carrier 34, link the bent axle 26 that driving engine 22 is arranged, on sun gear 31, link motor MG1 is arranged, on internal gear 32, reducing gear 35 is arranged via internal gear axle 32a binding, play the time spent of doing of electrical generator as motor MG1, to distribute to sun gear 31 sides and internal gear 32 sides according to its gear ratio from the power from driving engine 22 of planetary gear carrier 34 inputs, play the time spent of doing of electrical motor as motor MG1, to carry out integration from the power of driving engine 22 and the power of importing from sun gear 31 from what planetary gear carrier 34 was imported, export to internal gear 32 sides from motor MG1.The power of exporting to internal gear 32 finally is exported to drive wheel 63a, the 63b of vehicle via gear mechanism 60 and differential gear 62 from internal gear axle 32a.
Motor MG1 and motor MG2 can be used as electrical generator to drive and can be used as the known synchronous generator-motor that electrical motor drives, and carry out the exchange of electric power by inverter 41,42 and battery 50.Motor MG1, MG2 all carry out drive controlling by motor with electronic control unit (below, be called motor ECU) 40.Be used for drive controlling motor MG1, the needed signal of MG2 to motor ECU 40 inputs, for example from the signal of the position of rotation detecting sensor 43,44 of the position of rotation of the rotor that detects motor MG1, MG2 and the phase current that imposes on motor MG1, MG2 by not shown current sensor senses etc., from the switch controlling signal of motor ECU 40 outputs to inverter 41,42.Motor ECU 40 communicates with electronic control unit 70 with hybrid power, by coming drive controlling motor MG1, MG2 with the control signal of electronic control unit 70, and as required the data relevant with the operative condition of motor MG1, MG2 are exported to hybrid power with electronic control unit 70 from hybrid power.
Battery 50 manages with electronic control unit (below, be called battery ECU) 52 by battery.To battery ECU 52 input manager batteries 50 needed signals, for example from the voltage between terminals of the not shown voltage sensor between the terminal that is arranged on battery 50, charging and discharging currents from the not shown current sensor on the lead-out terminal bonded assembly electric wireline 54 that is installed in battery 50, from battery temperature Tb that is installed in the temperature sensor 51 on the battery 50 etc., this battery ECU 52 calculates the residual capacity (SOC) that is used to manage battery 50, and based on this residual capacity that calculates (SOC), battery temperature Tb and input and output limit Win thereof, Wout calculates as the discharging and recharging of required value that is used for battery 50 is discharged and recharged and requires power P b *Deng, by communication data are exported to hybrid power electronic control unit 70 as required.
Hybrid power is to be the microprocessor at center with CPU 72 with electronic control unit 70, except CPU 72, also comprises: the ROM 74 of storage processing program; The RAM76 of temporary transient storage data; And not shown input/output port and communication port.Ignition signal from ignition lock 80, shift pattern SP from the shift pattern sensor 82 of the actuated position that detects gear-shift lever 81, accelerator opening Acc from the accelerator pedal position sensor 84 of the amount of treading in that detects acceleration pedal 83, brake pedal position BP from the brake pedal position sensor 86 of the amount of treading in that detects brake pedal 85, vehicle velocity V from car speed sensor 88, from being installed in drive wheel 63a, 63b and not shown flower wheel 63c, wheel velocity Vwa～the Vwd of vehicle-wheel speed sensor 65a～65d on the 63d etc. are transfused to hybrid power electronic control unit 70 via input port.As mentioned above, hybrid power is connected with Engine ECU 24, motor ECU 40 and battery ECU 52 via communication port with electronic control unit 70, and carries out the exchange of various control signals and data with Engine ECU 24, motor ECU 40 and battery ECU 52.
So the hybrid vehicle 20 of the embodiment that constitutes is according to the corresponding accelerator opening Acc of the amount of entering into of acceleration pedal 83 and vehicle velocity V being calculated the torque that requires that export to as the internal gear axle 32a of axle drive shaft with chaufeur, to driving engine 22, motor MG1 and the motor MG2 control of turning round, so that inwardly mesh gear shaft 32a output requires the corresponding demanded driving force of wanting of torque with this.The running control of driving engine 22, motor MG1 and motor MG2 has following pattern etc.: the torque conversion operation mode, driving engine 22 is turned round control so that export and want the corresponding power of demanded driving force from driving engine 22, and motor MG1 and motor MG2 are carried out drive controlling so that whole power of exporting from driving engine 22 carry out torque conversion and are exported to internal gear axle 32a by planetary wheel 30, motor MG1 and motor MG2; Charge-discharge drive mode, driving engine 22 is turned round control so that export and want the corresponding power of the needed electric power sum of discharging and recharging of demanded driving force and battery 50 from driving engine 22, and motor MG1 and motor MG2 are carried out drive controlling, be accompanied by discharging and recharging of battery 50, to carry out torque conversion via planetary wheel 30, motor MG1 and motor MG2 from all or part of of the power of driving engine 22 output, will export to internal gear axle 32a by demanded driving force; The motor running pattern, turn round control with the running of shutting engine down 22 and will from motor MG2 with want the corresponding takeoff output of demanded driving force to internal gear axle 32a.
Below, action to the hybrid vehicle 20 of embodiment, particularly the catalyst layer temperature when clean-up device 134 uprises, carries out catalyst deterioration when suppressing control, chaufeur release the gas pedal 83 or wait and act on the action that braking force forms the light hours and describe by stepping on brake pedal 85.Here, in an embodiment, what catalyst deterioration suppressed the control execution is following control, that is: by forbidding driving engine 22 oil-breaks, make a large amount of air supplies give clean-up device 134, further heats up thereby suppress catalyst layer.That is, be in the braking less power of medium vehicle requirement and need be the time, also to driving engine 22 fuel supplying and the control of lighting a fire from the power of driving engine 22 even carry out at vehicle.Suppress the flag settings program by carrying out not shown catalyst deterioration by Engine ECU, and catalyst deterioration is suppressed flag F c value of being changed to 1 when above when reach set point of temperature from the catalyst layer temperature that is installed in the temperature sensor 135 on the clean-up device 134, suppress flag F c according to this catalyst deterioration thus, carry out this catalyst deterioration by hybrid power with electronic control unit 70 and suppress control.An example of the drive controlling that Fig. 3 is expression when comprising that this catalyst deterioration suppresses the vehicle braked of control, the diagram of circuit of the glancing impact control program of carrying out with electronic control unit 70 by hybrid power.This program is carried out repeatedly every specified time (for example every several milliseconds).
When carrying out the glancing impact control program, at first, hybrid power is carried out the processing (step S100) that desired data is controlled in input with the CPU 72 of electronic control unit 70, and described data have: from brake pedal position BP, the vehicle velocity V from car speed sensor 88, the rotational speed N e of driving engine 22, rotational speed N m1, the Nm2 of motor MG1, MG2, the import limit Win that catalyst deterioration suppresses control mark Fc, battery 50 etc. of brake pedal position sensor 86.Here, the rotational speed N e of driving engine 22 is from data Engine ECU 24 inputs, that basis goes out from the calculated signals that is installed in the crank-position sensor 140 on the bent axle 26 by communication.In addition, the rotational speed N m1 of motor MG1, MG2, Nm2 for by communication from data motor ECU 40 input, that calculate according to position of rotation by the rotor of position of rotation detecting sensor 43,44 detected motor MG1, MG2.And what catalyst deterioration suppressed flag F c input is the data of setting by Engine ECU 24.The import limit Win of battery 50 for by communication from data battery ECU52 input, that set according to the residual capacity (SOC) of battery 50.
When so importing data,, set export to be attached at according to the brake pedal position BP of input and vehicle velocity V and require braking torque Tr as the internal gear axle 32a of axle drive shaft on drive wheel 63a, the 63b as the desired braking torque of vehicle *(step S110).In an embodiment, require braking torque Tr *According to following setting, that is: predesignate brake pedal position BP and vehicle velocity V and require braking torque Tr *Relation and be stored in the ROM 74 with mapping graph as requiring braking torque to set, when brake pedal position BP and vehicle velocity V were provided, derivation required braking torque Tr accordingly from the mapping graph of storage *Fig. 4 represents to require braking torque to set an example using mapping graph.
Then, suppress the rotating speed of target Ne that flag F c and vehicle velocity V are set driving engine 22 according to catalyst deterioration *(step S120).Though,, or come define objective rotational speed N e according to vehicle velocity V for outputting power promptly when the then bend the throttle 83 in an embodiment owing to be to be in the middle of the braking and need be from the power of driving engine 22 *For example, for rotating speed of target Ne *Can followingly set, that is: when catalyst deterioration suppresses flag F c for value 0 (not needing catalyst deterioration to suppress control) the not enough regulation speed of a motor vehicle (10km/h or 20km/h), value of being set at 0 for shutting engine down 22 is when being when stipulating that the speed of a motor vehicle is above, (for example is set at the regulation rotating speed, 800rpm or 1000rpm etc.), when catalyst deterioration suppresses flag F c be value 1 when (needing the catalyst deterioration inhibition to control), is set at regulation rotating speed (for example, 800rpm or 1000rpm etc.).
Then, to the rotating speed of target Ne of the driving engine 22 of the rotational speed N e of driving engine 22 of input and setting *Rotation speed difference deltan N calculate (step S130), rotation speed difference deltan N and the threshold value Nref that calculates compared (step S140).Here, though threshold value Nref be do not carry out the positive control of rotating speed by motor MG1 also can be easily with rotating speed of target Ne *The sort of degree of independent operation driving engine 22, with rotating speed of target Ne *Between speed discrepancy, and be set to less relatively value.
Here, consider following situation: chaufeur bend the throttle 83 under the relatively large state of vehicle velocity V, unclamps the acceleration pedal of stepping on 83 with the high relatively running engine 22 that transfers, and steps on brake pedal 85 lightly.At this moment, because rotating speed of target Ne *Be set at less relatively regulation rotating speed, so rotation speed difference deltan N is greater than threshold value Nref.At this moment, then catalyst deterioration is suppressed whether flag F c is that value 1 is judged (step S150).When catalyst deterioration suppresses flag F c is when being worth 0, that is, when not needing catalyst deterioration to suppress control, Engine ECU 24 is indicated to carry out oil-break, temporarily stops to driving engine 22 fuel supplying (step S160), to the torque instruction Tm1 of motor MG1 *Value of being set at 0 (step S170).Specifically, the control signal that will carry out oil-break sends to Engine ECU 24, and the Engine ECU 24 that receives this control signal stops fuel spraying, and stops igniting simultaneously, carries out oil-break thus.As the torque instruction Tm1 that so calculates motor MG1 *The time, with the rotational speed N m2 of the deviation between the consumption electric power (generation power) of the import limit Win of battery 50 and motor MG1 divided by motor MG2, wherein the consumption electric power of motor MG1 is the torque instruction Tm1 to the motor MG1 that calculates *(at this moment, for being worth 0) multiply by that the rotational speed N m1 of motor MG1 at that time obtains, and thus, being calculated by following formula (1) can be from the torque limits Tmin as the torque lower limit (step S250) of motor MG2 output, simultaneously operating needs braking torque Tr *, torque instruction Tm1 and power distribution integration mechanism gear than ρ, being calculated by formula (2) should be from the supposition motor torque Tm2tmp (step S260) as torque of motor MG2 output, with the torque instruction Tm2 of motor MG2 *Be set at value (step S270), with the torque instruction Tm1 that sets with the torque limits Tmin restriction supposition motor torque Tm2tmp that calculates *, Tm2 *Send to motor ECU 40 (step S280), thereby finish this program.Receive torque instruction Tm1 *, Tm2 *Motor ECU 40 in order to use torque instruction Tm1 *, Tm2 *CD-ROM drive motor MG1, MG2, and the on-off element of inverter 41,42 is carried out switch control.Expression is accompanied by the oil-break of driving engine 22 and an example of the alignment chart of the rotating speed of the turning unit of the power distribution integration mechanism 30 of glancing impact and the mechanical relationship between the torque is illustrated among Fig. 5.Among the figure, the S axle in left side represent motor MG1 rotational speed N m1, be the rotating speed of sun gear 31, the C axle represent driving engine 22 rotational speed N e, be the rotating speed of planetary gear carrier 34, the rotational speed N m2 that the R axle is represented motor MG2 is divided by the gear of the reducing gear 35 rotational speed N r than the internal gear 32 of Gr gained.Thick-line arrow on the R axle is represented when using torque instruction Tm2 described later *Act on the torque on the internal gear axle 32a during CD-ROM drive motor MG2.In addition, among the figure, solid line is the conllinear when stepping on brake pedal 85, and dotted line represents that the time of conllinear changes.As shown in the figure, by oil-break, the rotational speed N e of driving engine 22 diminishes gradually.Wherein, formula (2) can easily derive from this alignment chart.
Tmin＝(Win-Tm1 *·Nm1)/Nm2 (1)
Tm2tmp＝(Tr *+Tm1 */ρ)/Gr (2)
When in step S150, judging catalyst deterioration inhibition flag F c for value 1, promptly, when needing catalyst deterioration to suppress control, Engine ECU 24 is indicated to continue the explosive combustion (igniting) (step S180) of driving engine 22, in order to make the rotational speed N e of driving engine 22 reach rotating speed of target Ne under the state that continues this explosive combustion *, by the torque instruction Tm1 of following formula (3) setting motor MG1 *(step S190), the torque instruction Tm1 of the motor MG1 that use is set *Set the torque instruction Tm2 of motor MG2 *(step S250～S270), and with the torque instruction Tm1 that sets *, Tm2 *Send to motor ECU 40 (step S280), thereby finish this program.Here, specifically, the control signal of this intention of expression is sent to Engine ECU 24, the Engine ECU 24 that receives this control signal is carried out fuel injection control and is compared many slightly fuel with this rotational speed N e independent operation driving engine 22 time to spray, and carry out Ignition Control, continue the explosive combustion of driving engine 22 thus.Therefore, from the some torques of driving engine 22 outputs.Formula (3) be accompanied by driving engine 22 explosive combustion continue on for rotational speed N e with driving engine 22 as rotating speed of target Ne *Controlled reset in relational expression, " k1 " that the right is first is the gain of proportional, " k2 " that the right is the 2nd is the gain of integral.Continue the explosive combustion of driving engine 22 from needs and consider, this gain " k1 " " k2 " is set to and compares little value when driving engine 22 is exported relatively large torque.An example of the alignment chart of the mechanical relationship of the rotating speed of the turning unit of the power distribution integration mechanism 30 of expression this moment and torque is illustrated among Fig. 6.As mentioned above, since under the state of the explosive combustion that continues driving engine 22 drive controlling by motor MG1 the rotational speed N e of driving engine 22 is reached rotating speed of target Ne *, therefore can promptly make the rotational speed N e of driving engine 22 be reduced to rotating speed of target Ne *Wherein, under this state, after the some torques of driving engine 22 output, with the corresponding torque of this part on internal gear axle 32a, will append to its torque of offsetting from motor MG2 and to require braking torque Tr *On.
Tm1＝k1·ΔN+k2∫ΔN·dt(3)
In step S140, suppress control no matter whether carry out catalyst deterioration, when the rotational speed N e that is judged as driving engine 22 is that threshold value Nref is when following, to rotating speed of target Ne *(step S200) checks, as rotating speed of target Ne *, Engine ECU 24 is not indicated so that driving engine 22 becomes under the situation of not carrying out torque output with rotating speed of target Ne for being worth 0 o'clock *The state of the independent operation that turns round (step S210) is as rotating speed of target Ne *For being worth, send the indication (step S230) that the running of driving engine 22 stops at 0 o'clock to Engine ECU 24.Then, to the torque instruction Tm1 of motor MG1 *Value of being set at 0 (step S240), the torque instruction Tm1 of the motor MG1 that use is simultaneously set *Set the torque instruction Tm2 of motor MG2 *(step S250～S270), and with the torque instruction Tm1 that sets *, Tm2 *Send to motor ECU 40 (step S280), thereby finish this program.Thus, when rotating speed of target Ne is not value 0 time, driving engine 22 carries out independent operation with this rotating speed.
Fig. 7 is expression when to catalyst deterioration inhibition flag F c value of being changed to 1, and chaufeur is stepped on the instruction diagram that brake pedal 85 carries out the time dependent examples such as state of glancing impact driving engine 22 and motor MG1, MG2.As shown in the figure, when the time T 1 later time T 2 that chaufeur rises in the temperature of the catalyst layer of clean-up device 134, catalyst deterioration suppresses flag F c value of being changed to 1 is stepped on brake pedal 85, for the continuation of the explosive combustion (igniting) that is accompanied by driving engine 22 is reduced to rotating speed of target Ne with the rotational speed N e of driving engine 22 *, and to the torque instruction Tm1 of motor MG1 *Setting is based on the rotational speed N e and the rotating speed of target Ne of driving engine 22 *The torque of rotation speed difference deltan N, so driving engine 22 can reduce its rotational speed N e under the situation of the some torques of output.At this moment, by come the torque of negative function on internal gear axle 32a from motor MG1 output torque, require braking torque Tr from motor MG2 output simultaneously *, so vehicle velocity V diminishes.Rotational speed N e and rotating speed of target Ne at driving engine 22 *Rotation speed difference deltan N reach in the time T 3 of threshold value Nref, driving engine 22 independent operation are to the torque instruction Tm1 of motor MG1 *The value of being set at 0.Then, export and require braking torque Tr from motor MG2 *Corresponding torque.
Hybrid vehicle 20 according to the embodiment of above explanation, when requiring catalyst deterioration to suppress control when catalyst deterioration is suppressed flag F c value of being changed to 1, and when closing accelerator when stepping on brake pedal 85, control motor MG1 is so that make its rotational speed N e reach rotating speed of target Ne in the explosive combustion (igniting) that continues driving engine 22 *Therefore, can be promptly the rotational speed N e of driving engine 22 be become rotating speed of target Ne *As a result, useless consumption of fuel can be suppressed, thereby the efficiency of vehicle can be improved.
In the hybrid vehicle 20 of embodiment, when catalyst deterioration being suppressed flag F c value of being changed to 1 and stepping on brake pedal 85, use the torque instruction Tm1 of the relational expression setting motor MG1 of controlled reset *So that be accompanied by driving engine 22 explosive combustion (igniting) continue make the rotational speed N e of driving engine 22 reach rotating speed of target Ne *, still, also can control motor MG1, make the rotational speed N e of driving engine 22 change the mode of regulation rotating speed to rotating speed of target Ne with time per unit *Change.
In the hybrid vehicle 20 of embodiment, when catalyst deterioration suppresses flag F c value of being changed to 1 and steps on brake pedal 85, set the torque instruction Tm1 of MG1 *So that be accompanied by driving engine 22 explosive combustion (igniting) continue make the rotational speed N e of driving engine 22 reach rotating speed of target Ne *, in the scope of the import limit Win of battery 50, set the torque instruction Tm2 of MG2 then *But, also braking torque Tr as requested *In the scope of the import limit Win of battery 50, set the torque instruction Tm2 of motor MG2, set the torque instruction Tm1 of MG1 then *So that be accompanied by driving engine 22 explosive combustion (igniting) continue make the rotational speed N e of driving engine 22 reach rotating speed of target Ne *At this moment, the torque instruction Tm2 of motor MG2 *Import limit Win by battery 50 limits restriction that setting when or do not accept import limit Win when value is set near it, promptly surpasses the import limit Win of battery 50 by the partial power of motor MG1 generating.At this moment, because battery 50 is aging, the aging of catalyst also slightly carries out, and still, also temporarily the fuel of shutting engine down 22 sprays, and makes the rotational speed N e of driving engine 22 reach rotating speed of target Ne *Below, the hybrid vehicle 20B as second embodiment describes with above-mentioned processing.
Fig. 8 is the pie graph of schematic representation loading as the hybrid vehicle 20B of the power take-off implement of second embodiment.As shown in the figure, the hybrid vehicle 20B of second embodiment has only expressed current sensor 53a that detects the charging and discharging currents Ib that battery 50 is discharged and recharged and the voltage sensor 53b that detects voltage between terminals (cell pressure) Vb of battery 50 near the lead-out terminal of battery 50, and identical with the formation of the hybrid vehicle 20 of first embodiment.For fear of repeat specification, the formation of the hybrid vehicle 20B of second embodiment is the identical label of formation of mark and the hybrid vehicle 20 of first embodiment also, and omits its detailed explanation.
In the hybrid vehicle 20B of second embodiment, the glancing impact control program of execution graph 9 is to replace the glancing impact control program of Fig. 3.In the glancing impact control program of Fig. 9, at first, input control needed data (step S300), for example: brake pedal position BP, the vehicle velocity V from car speed sensor 88, the rotational speed N e of driving engine 22, rotational speed N m1, the Nm2 of motor MG1, MG2, catalyst deterioration from brake pedal position sensor 86 suppress flag F c, the import limit Win of battery 50, charging and discharging currents Ib, the cell pressure Vb etc. of battery 50.Brake pedal position BP and vehicle velocity V according to input, use shown in Figure 4 to require braking torque to set to use mapping graph, set export to be attached at as the desired braking torque of vehicle and require braking torque Tr as the internal gear axle 32a of axle drive shaft on drive wheel 63a, the 63b *(step S310).Here, the charging and discharging currents Ib of battery 50 and cell pressure Vb for will by the detected charging and discharging currents In of current sensor 53a with by the data of the detected cell pressure Vb of voltage sensor 53b by communicating by letter and importing from battery ECU 52.Wherein, about the rotational speed N e of driving engine 22, rotational speed N m1, the Nm2 of motor MG1, MG2, the input that catalyst deterioration suppresses the import limit Win of flag F c, battery 50, in first embodiment, be illustrated.
Then, with the import limit Win of the battery 50 rotational speed N m2 divided by motor MG2, calculating can be from the torque limits Tmin as the torque lower limit (step S320) of motor MG2 output, and will require braking torque Tr *Than Gr, calculation assumption motor torque Tm2tmp (step S330) is as the torque instruction Tm2 that sets motor MG2 with the value of the torque limits Tmin restriction supposition motor torque Tm2tmp that calculates divided by the gear of reducing gear 35 *(step S340).Then, identical with the step S120～S140 of the glancing impact control program of Fig. 3, suppress the rotating speed of target Ne (step S350) that flag F c and vehicle velocity V are set driving engine 22 according to catalyst deterioration, simultaneously to the rotating speed of target Ne of the driving engine 22 of the rotational speed N e of the driving engine 22 of input and setting *Rotation speed difference deltan N calculate (step S360), rotation speed difference deltan N and the threshold value Nref that calculates compared (step S370).When rotation speed difference deltan N greater than value during Nref, catalyst deterioration is suppressed whether flag F c is that value 1 is judged (step S380), when catalyst deterioration suppresses flag F c is when being worth 0, being judged as does not need catalyst deterioration to suppress control, oil-break is carried out in 24 indications to Engine ECU, temporarily to stop, calculating the torque instruction Tm1 that sets motor MG1 by following formula (4) simultaneously to driving engine 22 fuel supplying (step S400) *, so that the rotational speed N e that makes driving engine 22 is to rotating speed of target Ne *Side changes rotational speed N rt (step S410).Here, rotational speed N rt is the rotating speed that makes the amount of rotational speed N e variation for the rotational speed N e cataclysm that does not make driving engine 22, can wait by the starting frequency of glancing impact control program and stipulate.In addition, formula (4) is the oil-break that is accompanied by driving engine 22, time per unit only changes the rotational speed N e of driving engine 22 relational expression of the controlled reset of rotational speed N rt, and " k3 " that the right is first is the gain of proportional, and " k4 " that the right is the 2nd is the gain of integral.As mentioned above, by time per unit with the rotational speed N e of driving engine 22 to rotating speed of target Ne *Side changes rotational speed N rt, can suppress the cataclysm of the rotational speed N e of driving engine 22.And, if when considering under the state of transmitting motivation 22 with high relatively transhipment, to close accelerator and when stepping on brake pedal 85 gently, then owing to slowly reduce by the rotational speed N e of the driving engine 22 of oil-break, so as the torque instruction Tm1 of motor MG1 *Direction become the minimizing of the rotational speed N e that suppresses driving engine 22, when the rotational speed N e of driving engine 22 is higher, carry out power consumption by motor MG1, when the rotational speed N e of driving engine 22 is low, carry out electric power regeneration by motor MG1.
Tm1 *＝k3·Nr+k4∫Nr·dt(4)
As the torque instruction Tm1 that as above sets motor MG1 *The time, check torque instruction Tm1 *Whether be value 0 (step S480), as torque instruction Tm1 *Not for being worth 0 o'clock, at the torque instruction Tm2 of motor MG2 *On, add (Tm1*/ρ) is divided by the gear of reducing gear 35 value than Gr gained, is set thus to be new torque instruction Tm2 owing to act on torque on the internal gear axle 32a from motor MG1 output torque *(step S490).By so setting the torque instruction Tm2 of motor MG2 *, can suppress the cogging that causes because of CD-ROM drive motor MG1.Then, with the torque instruction Tm1 that sets *, Tm2 *Send to motor ECU 40 (step S500), thereby finish this program.
When in step S380, being judged as catalyst deterioration inhibition flag F c for value 1, promptly, need carry out catalyst deterioration when suppressing control, with the amassing of the charging and discharging currents Ib of battery 50 and cell pressure Vb, be that the charge-discharge electric power Pb of battery 50 and the import limit Win of battery 50 compare (step S390).When enough hour of the import limit Win of battery 50 (when absolute value is big), charge-discharge electric power Pb is greater than import limit Win (absolute value is less), when the import limit Win of battery 50 is big (absolute value hour), by the torque instruction Tm1 of motor MG1 *Setting and the torque instruction Tm2 of corresponding therewith motor MG2 *Reset, charge-discharge electric power Pb is less than import limit Win (absolute value is bigger).In step S390, judge whether reaching such state.To further narrate this back.
As the charge-discharge electric power Pb of battery 50 during greater than the import limit Win (absolute value is less) of battery 50, Engine ECU 24 is indicated to continue the explosive combustion (igniting) (step S420) of driving engine 22, set the torque instruction Tm1 of motor MG1 by above-mentioned formula (3) *, so that under the state that continues this explosive combustion, make the rotational speed N e of driving engine 22 reach rotating speed of target Ne *(step S430), the torque instruction Tm1 of the motor MG1 that use is set *Reset the torque instruction Tm2 of motor MG2 *(step S480, S490) is with the torque instruction Tm1 that sets *, Tm2 *Send to motor ECU 40 (step S500), thereby finish this program.To be described in detail these processing below.
As the charge-discharge electric power Pb of battery 50 during less than the import limit Win of battery 50 (absolute value is bigger), be judged as under the state of the explosive combustion that continues driving engine 22 and can not make the rotational speed N e of driving engine 22 become rotating speed of target Ne *, oil-break is carried out in 24 indications to Engine ECU, temporarily stops to driving engine 22 fuel supplying (step S400), calculates the torque instruction Tm1 that sets motor MG1 by above-mentioned formula (4) simultaneously *, make the rotational speed N e of driving engine 22 to rotating speed of target Ne *One side changes rotational speed N rt (step S410), uses the torque instruction Tm1 of the motor MG1 that sets *, to the torque instruction Tm2 of motor MG2 *Reset (step S480, S490), with the torque instruction Tm1 that sets *, Tm2 *Send to motor ECU 40 (step S500), thereby finish this program.With the state of the explosive combustion that continues driving engine 22 the rotational speed N e of driving engine 22 is being become rotating speed of target Ne *Control in, when the rotational speed N e of driving engine 22 is higher, carry out electric power regeneration by motor MG1, when the rotational speed N e of driving engine 22 is low, in motor MG1, carry out power consumption, so the charge-discharge electric power Pb of battery 50 is the rotational speed N e of the driving engine 22 that carries out electric power regeneration by motor MG1 higher the time less than the import limit Win of battery 50 time.At this moment, if stop the electric power regeneration of motor MG1, then can avoid the import limit Win of the charge-discharge electric power Pb of battery 50 less than battery 50, driving engine 22 becomes the state with high rotational speed N e running.In an embodiment, even produce some catalyst deterioration, can not give battery 50 chargings, for the rotational speed N e with driving engine 22 becomes rotating speed of target Ne with excessive electric power yet *, can carry out the oil-break that temporarily stops to driving engine 22 fuel supplying.And,, and come drive controlling motor MG1 by carrying out oil-break for the rotational speed N e that can not make driving engine 22 produces cataclysm.As mentioned above, owing to before the rotational speed N e of driving engine 22 step-down, in motor MG1, carry out power consumption, therefore can avoid giving battery 50 chargings with excessive electric power.
On the other hand, in step S370, suppress control, when the rotational speed N e that is judged as driving engine 22 is that threshold value Nref is when following, to rotating speed of target Ne no matter whether carry out catalyst deterioration *(step S440) checks, as rotating speed of target Ne *, Engine ECU 24 is not indicated, driving engine 22 is become under the situation of not carrying out torque output with rotating speed of target Ne for being worth 0 o'clock *The state of the independent operation that turns round (step S450) is as rotating speed of target Ne *For being worth, send the indication (step S460) that the running of driving engine 22 stops at 0 o'clock to Engine ECU 24.Then, to the torque instruction Tm1 of motor MG1 *Value of being set at 0 (step S470), and with the torque instruction Tm1 that sets *, Tm2 *Send to motor ECU 40 (step S500), thereby finish this program.Thus, as rotating speed of target Ne *For being worth 0 o'clock, driving engine 22 does not carry out independent operation with this rotating speed.
According to the hybrid vehicle 20B of second embodiment of above explanation, when the rotational speed N e that carries out driving engine 22 with the state of the explosive combustion that continues driving engine 22 becomes rotating speed of target Ne *Control, the charge-discharge electric power Pb of battery 50 is during less than the import limit Win (absolute value is bigger) of battery 50, is judged as under the state of the explosive combustion that continues driving engine 22 to make the rotational speed N e of driving engine 22 become rotating speed of target Ne *, by carrying out the oil-break temporarily stop to driving engine 22 fuel supplying, can become rotating speed of target Ne under the battery 50 electrically-charged situations rotational speed N e with excessive electric power with driving engine 22 *And, motor MG1 is so that the rotational speed N e time per unit of driving engine 22 only changes rotational speed N rt in control, can suppress the rotational speed N e cataclysm of driving engine 22, thus the unfavorable condition that can avoid the rotational speed N e cataclysm because of driving engine 22 to cause, for example, produce unfavorable condition such as torque shock ends.Certainly, when requiring catalyst deterioration to suppress control to catalyst deterioration inhibition flag F c value of being changed to 1, and closing accelerator when stepping on brake pedal 85, control motor MG1 is so that make its rotational speed N e reach rotating speed of target Ne in the explosive combustion (igniting) that continues driving engine 22 *, therefore can be under the situation of aging catalyst not, promptly the rotational speed N e with driving engine 22 becomes rotating speed of target Ne *As a result, useless consumption of fuel can be suppressed, thereby the efficiency of vehicle can be improved.
In the hybrid vehicle 20B of second embodiment, when the rotational speed N e that carries out driving engine 22 with the state of the explosive combustion that continues driving engine 22 becomes rotating speed of target Ne *Control the time battery 50 charge-discharge electric power Pb when driving engine 22 being carried out oil-breaks less than the import limit Win of battery 50, control motor MG1 makes the rotational speed N e time per unit of driving engine 22 only change rotational speed N rt, but, also can be to the torque instruction Tm1 of motor MG1 *Value of being set at 0 and do not carry out the control of said motor MG1.
In the hybrid vehicle 20 of first embodiment and second embodiment, 20B, the power of motor MG2 is exported to internal gear axle 32a by reducing gear 35 speed changes, but, shown in the hybrid vehicle 120 of the variation of Fig. 8, also the power of motor MG2 can be connected on the axletree different (axletree that is connected wheel 64a, 64b among Fig. 8) with the axletree that is connected with internal gear axle 32a (being connected with the axletree of drive wheel 63a, 63b).
Hybrid vehicle 20 at first embodiment and second embodiment, among the 20B, the power of driving engine 22 exported to by power distribution integration mechanism 30 be connected drive wheel 63a, internal gear axle 32a on the 63b as axle drive shaft, but, shown in the hybrid vehicle 220 of the variation of Fig. 9, also can have the internal rotor 232 on the bent axle 26 that is connected driving engine 22 and be connected and output power to drive wheel 63a, the outer rotor 234 of the axle drive shaft of 63b, and can having a part with the power of driving engine 22, to pass to axle drive shaft be a pair of rotor electromotor 230 of electric power simultaneously with remaining power conversion.
In an embodiment, hybrid vehicle 20,20B are illustrated, if but as carrying out the power take-off implement that above-mentioned catalyst deterioration suppresses control, also can be loaded on the moving bodys such as vehicle except that automobile, boats and ships, aerocraft, on the non-mobile devices such as the construction equipment of can also packing into.In addition, also can be used as the mode of the control method of above-mentioned power take-off implement.
More than, use embodiment that the specific embodiment of the present invention is illustrated, still, beyond any doubt, the present invention at all is not limited to the foregoing description, in the scope that does not break away from purport of the present invention, can implement in every way.
Industrial applicibility
The present invention can utilize on manufacturing industry of PTO and automobile etc.

Claims (12)

1. power take-off implement, to the axle drive shaft outputting power, described power take-off implement comprises:
Combustion engine;
The electric power input-output unit is connected on the output shaft and described axle drive shaft of this combustion engine, is accompanied by the input and output of electric power and power, will export to described axle drive shaft from least a portion of the power of described combustion engine;
Electrical motor can be to described axle drive shaft input and output power;
Electricity accumulating unit can carry out exchange of electric power with described electric power input-output unit and described electrical motor;
Require the propulsive effort setup unit, setting should be exported to the propulsive effort that requires of described axle drive shaft;
Target operative condition setup unit, when the explosive combustion continuation condition of the explosive combustion that continues described combustion engine is false, the propulsive effort that requires according to described setting, under the situation of the discontinuous running that comprises described combustion engine, set the target operative condition of this combustion engine, when described explosive combustion continuation condition is set up, according to the propulsive effort that requires of described setting, under the situation that keeps described combustion engine to remain in operation, set the target operative condition of this combustion engine; And
Control unit, during described explosive combustion continuation condition establishment, when the driving condition that is not in to the regulation of described axle drive shaft output braking force or light load, the high load capacity burning continues control in the execution, to described combustion engine, described electric power input-output unit and described electrical motor are controlled, make described combustion engine turn round with the target operative condition of described setting, and the feasible propulsive effort that requires propulsive effort based on described setting is exported to described axle drive shaft, when being in the driving condition of described regulation, carry out low load combustion and continue control, to described combustion engine, described electric power input-output unit and described electrical motor are controlled, the feasible continuation that is accompanied by the explosive combustion of described combustion engine, this combustion engine turns round with the target operative condition of described setting, and makes the propulsive effort that requires propulsive effort based on described setting be exported to described axle drive shaft.
2. power take-off implement as claimed in claim 1 is characterized in that,
When being in the driving condition of described regulation, described target operative condition setup unit is set at described target operative condition with described combustion engine with the operative condition that the rotating speed of stipulating carries out independent operation.
3. power take-off implement as claimed in claim is characterized in that,
When being in the driving condition of described regulation, described control unit is controlled to change the operative condition of this combustion engine in the renewable scope of the explosive combustion of described combustion engine, makes the operative condition of described combustion engine reach the target operative condition of described setting.
4. power take-off implement as claimed in claim 3 is characterized in that,
When being in the driving condition of described regulation, described control unit is controlled with the operative condition time per unit with described combustion engine and is changed the regulation rotating speed, and reaches the target operative condition of described setting.
5. power take-off implement as claimed in claim 1 comprises:
The import limit setup unit is set the import limit that allows electrically-charged maximum power as this electricity accumulating unit according to the state of described electricity accumulating unit,
Described control unit is controlled described combustion engine, described electric power input-output unit and described electrical motor in the scope of the import limit of described setting.
6. power take-off implement as claimed in claim 5 comprises:
The charge-discharge electric power detecting unit detects the electric power that described electricity accumulating unit is discharged and recharged,
When described control unit is to be described detected charge-discharge electric power to be in carry out described low load combustion in the scope of import limit of described setting when continuing control when being in the driving condition of described regulation, in the described combustion engine that can not turn round with the target operative condition of described setting, described control unit is controlled with the fuel injection that stops described combustion engine and this combustion engine is turned round with described target operative condition.
7. power take-off implement as claimed in claim 6 is characterized in that,
When described control unit sprayed for the fuel that stops described combustion engine and this combustion engine is controlled with described target operative condition running, described control unit was controlled according to the mode that the rotating speed time per unit that makes this combustion engine changes the regulation rotating speed.
8. power take-off implement as claimed in claim 1, wherein,
Described combustion engine is equipped with the waste gas purification apparatus that uses the catalyst purifying exhaust air,
Described explosive combustion continuation condition is to carry out the condition of the catalyst deterioration inhibition control of the catalyst deterioration that suppresses described waste gas purification apparatus.
9. power take-off implement as claimed in claim 1, wherein,
Described electric power input-output unit comprises triple axle power input-output unit and electrical generator, described triple axle power input-output unit is connected on these three axles of the output shaft of described combustion engine, described axle drive shaft and S. A., give wantonly two power in these three and to remaining axle input and output power, described electrical generator can be to described S. A. input and output power according to input and output.
10. a vehicle is characterized in that,
Be mounted with as each described power take-off implement of claim 1 to 9, and,
Axletree is attached on the described axle drive shaft.
11. the control method of a power take-off implement, described power take-off implement comprises: combustion engine; The electric power input-output unit is connected on the output shaft and described axle drive shaft of this combustion engine, is accompanied by the input and output of electric power and power, will export to described axle drive shaft from least a portion of the power of described combustion engine; Electrical motor can be to described axle drive shaft input and output power; Electricity accumulating unit can carry out exchange of electric power with described electric power input-output unit and described electrical motor, and the control method of described power take-off implement comprises the steps:
(a) when the explosive combustion continuation condition of the explosive combustion that continues described combustion engine is false, according to the propulsive effort that requires that should export to described axle drive shaft, under the situation of the discontinuous running that comprises described combustion engine, set the target operative condition of this combustion engine, when described explosive combustion continuation condition is set up, according to the described propulsive effort that requires, under the situation that keeps described combustion engine to remain in operation, set the target operative condition of this combustion engine;
(b) during described explosive combustion continuation condition establishment, when the driving condition that is not in to the regulation of described axle drive shaft output braking force or light load, the high load capacity burning continues control in the execution, described combustion engine, described electric power input-output unit and described electrical motor are controlled, make described combustion engine turn round with the target operative condition of described setting, and the feasible propulsive effort that requires propulsive effort based on described setting is exported to described axle drive shaft.
12. the control method of power take-off implement as claimed in claim 11, wherein,
In described step (b), when being that the scope that makes the charge-discharge electric power that described electricity accumulating unit is discharged and recharged be positioned at the import limit of described electricity accumulating unit is when carrying out described low load combustion and continuing control when being in the driving condition of described regulation, in the described combustion engine that can not turn round with the target operative condition of described setting, control with the fuel that stops described combustion engine and spray and this combustion engine is turned round with described target operative condition.
CN2006800310764A 2005-08-25 2006-08-25 Power output device and its control method and vehicle Expired - Fee Related CN101247978B (en)

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